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Evaluation of sampling gear for demersal resource surveys

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Relation http://eprints.cmfri.org.in/5227/
 
Title Evaluation of sampling gear for demersal resource surveys
 
Creator Boopendranath, M R
Panikkar, P A
Kakati, V S
Raje, S G
Avhad, G K
Pandian, Paul
Sulaiman, P
George, V C
 
Subject Crafts & Gear
Demersal Fishes
 
Description The three demersal trawls evaluated were 38 m HSDT-II, indigenously developed
by CIFT for deep sea fishing in Indian EEZ; and two imported designs, viz.,
45.6 m Expo model demersal trawl and 50 m fish trawl operated from vessels of FSI
and IFP, respectively. Vertical opening at trawl mouth was heighest for 50 m fish
trawl (3.2 m), followed by Expo model demersal trawl (2.5 m) and 38 m HSDT-II
(2.2 m), due to differences in overall dimensions and design features. Estimate of
horizontal opening between otter boards was highest for 38 m HSDT-II probably due
to low drag of the gear, followed by 45.6 m and 50 m trawls. Lowest catch per unit
effort obtained by 38 m HSDT-II is presumably due to smaller dimensions of the gear,
larger codend mesh size and difference in ground rig, in addition to chance factors.
However, 38 m HSDT-II scores on several features desirable in demersal sampling
gear such as simplicity in design and construction, ease of operation; lower twine
surface area and drag; and ground rig suitable for wider range of bottom conditions.
Modifications to make it more effective while sampling for crustaceans and small sized
finfish components are described.
 
Date 1996
 
Type Conference or Workshop Item
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/5227/1/49.pdf
Boopendranath, M R and Panikkar, P A and Kakati, V S and Raje, S G and Avhad, G K and Pandian, Paul and Sulaiman, P and George, V C (1996) Evaluation of sampling gear for demersal resource surveys. In: Proceedings of the Second workshop on scientific results of FORV Sagar Sampada, 15-17 February 1994, Kochi.